Bulborama compact fluorescent light bulbs are an efficient way to light sockets once traditionally reserved for incandescents. Supra Life CFL's are lightweight, generate minimal heat, light instantly, provide excellent color rendition, and are available in low profile sizes to fit a wide variety of fixtures. With lifespans up to 36,000 hours, our compact fluorescents offer tremendous energy cost savings and years of maintenance free operation. ***NOTE*** THIS ITEM IS NOT FOR USE ON STANDARD 110-130 VOLT HOUSEHOLD CIRCUITS. OPERATE ONLY ON 277 VOLT CIRCUITS.